Multiscale Fracturing in Medium- to Low-Rank Coals and Its Implications on Coalbed Methane Production in the Baode Area, Eastern Ordos Basin, China by Wei Zhang, Baoshan Zhao, Qingfeng Zhang, Jikun Zhang, Ziling Li, Xiaoguang Sun, Mingming Yan

“…Herein, we present a case study, combining underground coal mine surveying and specimen, thin section, and scanning electron microscope observations for illustrating the ~m-, ~cm-, ~mm-, and ~μm-scale fractures present in the Baode area, eastern Ordos Basin, China. …”
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Application Study on Active Advanced Support Technology in Deep Roadway under Mine Goaf by Pengfei Jiang, Peng Xiao, Fanbao Meng, Suolin Jing, Jingkai Zhang, Ge Wang, Peng Zhao

“…To solve the problems of the rapid advance of the working face was delayed by complicated working procedure and high labor intensity, and the severe damage of roof bolt (anchor cable) induced by advanced hydraulic support, the deformation characteristics of surrounding rock, and the supporting principle of grouting truss anchor cable were analyzed theoretically by taking the roadway of 3_(down) coal seams 2326# working face in Sanhekou coal mine as the research object; then, the mechanical model of supporting structure of roadway under goaf was established. …”
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Critical Conditions and Energy Transfer Characteristics of the Failure Process of Coal-Rock Combination Systems in Deep Mines by Haitao Sun, Linchao Dai, Yanbao Liu, Hongwei Jin

“…With the steady increase in the size, intensification, and modernization of coal production enterprises, the deep coal resources in large coal bases are gradually entering the mining stage. When the coal mining reaches the deep zone, the interactions between various underground dynamic hazards begin to occur. …”
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Experimental Study on Physical Similar Model of Fault Activation Law Based on Distributed Optical Fiber Monitoring by Dingding Zhang, Yanyan Duan, Wengang Du, Jing Chai

“…The impact ground pressure in coal mining is closely related to the fault structure, and the fault activation pattern is different when the working face advances along the upper and lower plates of the fault, respectively. …”
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Three-Dimensional Reconstruction and Numerical Simulation Analysis of Acid-Corroded Sandstone Based on CT by Zizhen Miao, Shuguang Li, Jiangsheng Xie, Runke Huo, Fan Ding, Hongtao Zhu, Xingzhi Yang, Xiaoke Li

“…Due to its unique technological characteristics, coal mining and production often encounter an acid corrosion environment caused by acid gases. …”
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Investigation on the Vibration Effect of Shock Wave in Rock Burst by In Situ Microseismic Monitoring by Mingshi Gao, Hongchao Zhao, Yichao Zhao, Xiaojun Gao, Xiangyu Wang

“…Due to the complicity of mechanics of rock burst in coal mine roadway, the direct use of traditional investigation method applied in tunnel is inappropriate since the components of surrounding rock are much more complex in underground than that of tunnel. …”
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The Influence of Ventilation Arrangement on the Mechanism of Dust Distribution in Woxi Pithead by Zhiyong Zhou, Pei Hu, Chongchong Qi, Tianpei Niu, Ming Li, Long Tian

“…The established computational fluid dynamics (CFD) models were validated using the airflow velocity data and the dust concentration data monitored at different positions from the operating coal mine. A comprehensive sensitivity study was conducted to investigate the influence of four parameters on dust suppression, including the distance of pressure air duct outlet from working face (Lp-outlet), the distance of exhaust air duct inlet from working face (Le-inlet), the ratio of pressing air volume to lab sorption air volume (K), and the installation height of the air duct (H). …”
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Disastrous Mechanism of Water Discharge in Abandoned Gob above the Stope in Mining Extra-Thick Coal Seam by Haixiao Lin, Feng Yang, Zhengzheng Cao, Yue Wang, Xiaojian Jiao

“…With the mining geological conditions of the 8202 working face in the Tongxin coal mine as references, the disastrous mechanism of water discharge in the abandoned gob above the stope in the mining extra-thick coal seam is researched by numerical simulation with the UDEC numerical software, and the research results are obtained. …”
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Fold-Related Faults Track Progressive Fold Development from Layer-Parallel Shortening to Subsequent Orthogonal Extension within an Appalachian Buckle Fold System: Bear Valley Mine,... by Arlo Brandon Weil, Mary Beth Gray, Kylie G. Cush, Mattathias D. Needle, Juliet G. Crider

“…Outstanding three-dimensional exposures of adjacent folds in an abandoned coal mine within the Appalachian Valley-and-Ridge tectonic province permit a detailed analysis of macroscopic strain accommodation by minor faulting in the lead up to and during buckle folding. …”
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Serum Levels of Mitochondrial Fission- and Fusion-Related Genes of Coal Workers’ Pneumoconiosis and Risk Factor Analysis Based on a Generalized Linear Model by Xiao-Yu Li, Jing-Lin Wei, Yong-Xin Xie, Ji Zhao, Li-Ya Ma, Na Zhang, Hui-Fang Yang

“…Generalized linear regression analysis showed that lower school education, no respiratory protective measures, the working age beyond 15 years, and the type of work like coal mine drillers were the risk factors for CWP. With the aggravation of CWP, the degree of fibrosis and inflammation increased oxidative damage, increased mitochondrion division, and decreased fusion, which were more sensitive in the second and third stages of CWP. …”
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Quantitative 3-D investigation of faulting in deep mining using Mohr–Coulomb criterion and slip weakening law by Yatao Li, Xuehong Gao, Jianwei Yang, Erhu Bai

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Prediction of Production Performance of Refractured Shale Gas Well considering Coupled Multiscale Gas Flow and Geomechanics by Zhiqiang Li, Zhilin Qi, Wende Yan, Zuping Xiang, Xiang Ao, Xiaoliang Huang, Fei Mo

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Roof collapse accumulation and stress evolution characteristics of double-inclined mining in steeply inclined medium-thick coal seam by WU Yongping, XU Yingrui, XIE Panshi, WANG Hongwei, LANG Ding, HUANGFU Jingyu, QIANG Xubo, DU Yuqian, WANG Lechen, RU Xiaohui, WANG Zhengfu

“…Taking the 3212 working face in the Lüshuidong Coal Mine of Huayingshan Coal Industry Co., Ltd. as the engineering background, a double-inclined mining method was proposed based on pseudo-inclined mining. …”
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Instability Process of Crack Propagation and Tunnel Failure Affected by Cross-Sectional Geometry of an Underground Tunnel by Xianjie Hao, Shaohua Wang, Duoxiang Jin, Bo Ren, Xiangyang Zhang, Kailong Qiu, Yingjie Fan

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Influences of Different Factors and Sensitivity Analysis of Permeability of Gassy Coal by Bo Li, Yong Yuan, Yunpei Liang, Zhenghan Qin

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Experimental Research on Coal and Gas Delay Outburst and AE Characteristics under Conditions of Geostress and Gas Pressure Disturbance by Geng Jiabo, Liu Jiangtong, Li Xiaoshuang, Nie Wen, Zhang Dongming, Xu Jiang

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Instability Mode and Control Technology of Surrounding Rock in Composite Roof Coal Roadway under Multiple Dynamic Pressure Disturbances by Peng Wang, Nong Zhang, Jiaguang Kan, Xingliang Xu, Guangzhen Cui

“…The geological conditions of gas control roadway in the 22301 working face of Tunlan coal mine are taken as examples, and this study is carried out based on the analysis of roof instability conditions of composite roof coal roadway. …”
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Respiratory symptoms after coalmine fire and pandemic: A longitudinal analysis of the Hazelwood Health Study adult cohort. by Tyler J Lane, Matthew Carroll, Brigitte M Borg, Tracy A McCaffrey, Catherine L Smith, Caroline X Gao, David Brown, Amanda Johnson, David Poland, Shantelle Allgood, Jillian Ikin, Michael J Abramson

“…The aim of this study was to determine whether the effects of extreme but discrete PM2.5 exposure from a coal mine fire on respiratory symptoms abated, persisted, or worsened over time, and whether they were exacerbated by COVID-19. …”
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Properties and Engineering Applications of a New Goaf Grouting Filling Material by Xiao Feng, Chong Xia, Sifeng Zhang, Chuangui Li, Hongkui Zhao, Jianfeng Wu, Mengjun Chen, Jia Yan

“…The new C-FA-MS material was applied for the treatment of the goaf in the Wu Sizhuang coal mine. Core drilling detection and audiofrequency magnetotelluric survey revealed that the goaf was sufficiently filled.…”
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Multiple Influence Factor Sensitivity Analysis and Height Prediction of Water-Conducting Fracture Zone by Xiaobin Li, Quansheng Li, Xuhui Xu, Yongqiang Zhao, Peng Li

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